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2011MNRAS.413.1810B - Mon. Not. R. Astron. Soc., 413, 1810-1818 (2011/May-3)
The role of stellar collisions for the formation of massive stars.
BAUMGARDT H. and KLESSEN R.S.
Abstract (from CDS):
We find that a significant number of collisions only occur in clusters with initial half-mass radii rh ≤ 0.1 pc. After emerging from their parental gas clouds, such clusters end up too compact compared to observed young, massive open clusters. In addition, collisions lead mainly to the formation of a single runaway star instead of the formation of many high-mass stars with a broad mass spectrum. We therefore conclude that massive stars form mainly by gas accretion, with stellar collisions only playing a minor role if any at all. Collisions of stars in the pre-main-sequence phase might, however, contribute to the formation of the most massive stars in the densest star clusters and possibly to the formation of intermediate-mass black holes with masses up to a few 100 M☉.
Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): stars: formation - galaxies: star clusters: general
Simbad objects: 13
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